Multicolor screen for natural color cinematography and photography and in the manufacture thereof



Jan. 2, 1923. 1,440,373

J. CAMILLER ET AL. MULTlCOLOR SCREEN FOR NATURAL CoLoR CINEMATOGRAFHY AND PHOTOGRAPHY AND IN THE MANUFACTURE THEREOF FILED Nov. 1. I920.

1 INVENTURS Jea/mbazz i Patented 1.... 2, 1923.

UNITED STATES PATENT OFFICE.

JOHN CAMILLER AND ADAM HAY, OF LONDON, ENGLAND.

MULTICOLOR SCREEN FUR NATURAL COLOR CINEMATOGRAPHY AND PHOTOGRAPHY AND IN THE MANUFACTURE THEREOF.

Application filed November 1, 1920. Serial 1T0. 421,129.

To all whom it may concern:

Be it known that we, JOHN GAMILLER, a subject of the King of Great Britain and Ireland, and residing{ at Wykeham Man- 5 sions, 2O Rosendale oad, West Dulwich,

London, S. E. 21, England, and ADAM HAY,

a subject of the King of Great Britain and Ireland, and residing at 49 Old Bond Street,

London, W. 1, England, have'in-vented cer- IO tain new and useful Improvements in Multicolor Screens for Natural Color Cinematography and Photography and in the Manufacture Thereof, of which the following is a specification.

This invention relates screens for natural color cinematography and still photography, of the kind in which colored particles are used wholly or in part in conjunction with a tacky substance to form the color screen, the object of the invention being to provide an improved screen of this character by means of a process which is very much simplified as compared with known processes.

According to our invention we mix the colored grains into a paste with a liquid tacky material, of a composition which will not impair the color of the grains and with this paste we coat a suitable plate of glass or other'convenient material; The grains or particles may comprise threads or particles of glass or other suitable transparent or translucent material capable of being colored but of such a nature as to repel or to resist any dye that may be applied to the liquid tacky material for the purpose of coloring the same, and the grains or particles may be of one or more primary or other colors according to the character of the 40 screen that is desired and the urpose for which it is to be employed. Re erring now to the accompanying drawing which is a perspective view in section showing one form of screen in accordance with the invention.

The grains or particles 1 will be all of one color and will be mixed into a paste with a tacky substance 2 such as gelatine, fish glue, or other like material which will not dissolve the grains, and which is dyed with another color with a suitable dye solution preferably warmed to, sa F., in order to soften the gelatine. he paste is then apto multicolor.

' leave the colored plied to the film or base 3 and the outersurface 4 ofi the screen cleaned and dried in order to remove any dye that may be adhering to the surface of the particles, the result being a two-color screen ready for any desired operation.

In a similar manner a screen or fihn of three colors, five colors or other desired number of colors may be produced by employing grains or particles of the requisite plurality of colors.

If desired we may protect the prepared surface of the screen with a suitable transparent varnish or other medium.

The grains may, if desired, be formed by dissolving a gum or like substance such as gum sandrac in alcohol or other solvent, the solvents being dyed any desired color and then driving off the solvent so as to gum which is then crushed to form particles.

For dyeing the grains we use dyeswhich will be dissolved in the same solvent as that for the gum employed.

In order to facilitate the mixing and spreading of the pasty mixture formed from the tacky substance and colored grains,

we prefer to add glycerine to the mixturewhen preparing the same.

Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is 1. A process for the production of a multicolor screen of the kind referred to, which consists in mixing solid colored grains with a tacky medium of a composition which will not impair or absorb the color of the grains and thencoating a convenient support with the mixture.

2. A process according to claim 1 in which an additional color is obtained by suitably staining the tacky medium holding thecolored grains. 1

3. A process according to claim 1, according to which glycerine is added to the pasty names to this specification.

JOHN CAMILLER. ADAM HAY. 

